Use UFCS for reducing dependencies

[Dave P.]

On Saturday, 16 July 2022 at 22:10:13 UTC, Hipreme wrote:
> [...]

I like this. What's annoying is that it doesn't work smoothly 
with structs. Methods automatically deference pointers, but UFCS 
functions don't.

```D
struct Foo {
     int x;
     void mutate(){
         x++;
     }
}

void mutate2(ref Foo foo){
     foo.x++;
}

void main(){
     Foo foo;
     Foo* pfoo = &foo;

     // Both ref and pointer work for methods
     foo.mutate();
     pfoo.mutate();

     // Ref works for ufcs
     foo.mutate2();
     // But pointer doesn't work for UFCS

     // Can't do this:
     // pfoo.mutate2();

     // Must do this:
     (*pfoo).mutate2();

     assert(foo.x == 4);
}

```